There are also special orange diamonds for Roadworks

[Linked Image from athlone.ie]
[Linked Image from athlone.ie]

Some more uniquely irish examples:
[Linked Image from elve.net]
[Linked Image from elve.net]

And our VERY confusing direction signs, found at all rural intersections and can have up to 30 finger posts pointing towards every village (classified as a place having more than one house)
[Linked Image from isye.gatech.edu]

[This message has been edited by djk (edited 07-10-2003).]